Seven behaviors in optical fiber engineering can cause optical fiber damage

1. Do not clean the optical fiber before welding

Before optical fiber welding, the skin needs to be stripped, which is a very important step in cleaning. This step before cutting can effectively remove residual particles and other possible pollutants. If it is cleaned after wire cutting, it is easy to increase the additional burden of the welding machine in the prevention of electrical stage, shorten the service life of the electrode, lead to the nonlinear joint with bubbles, reduce the mechanical strength of the joint and lead to additional loss.

Cleaning method: use fast volatile nonflammable precision cleaning solution. Choose alcohol. Because alcohol will combine with water molecules in the air, resulting in pollution, good cleaning liquid is sealed and can not be washed back. In this way, cross pollution can be fully prevented.

Note: when cleaning the optical fiber, if you hear the "click" sound, it indicates that the light surface has been cleaned.

2. Improper cutting tools

The smoothness of optical fiber end face has an important impact on the light performance after fusion or termination. In the past, people often cut optical fibers manually with optical fiber cutter, which has high technical requirements for operators. But so far, there have been a lot of automatic cutting work. These tools can adjust the handshake and automatically complete the cutting. These tools can not only improve the safety of operators, but also protect the optical fiber.

Note: the cutting tool needs to be cleaned to reduce the breakage of optical fiber during welding. It is recommended to wipe with dry solvent and lint free cloth.

3. The optical fiber welding machine is not calibrated

It is very important to adjust the arc strength of the machine, especially before welding. If not calibrated, the cutting tool is likely to accumulate a large amount of calcium, resulting in unsatisfactory welding results.

Calibration method: put the optical fiber on the welding machine as if it needs welding, but do not conduct real welding. Instead, go to the maintenance menu of the welding machine and select the option of arc calibration or arc back measurement, and the welding machine will tell the operator how to calibrate step by step.

4. Micro bending of optical fiber

The slight bending of optical fiber is generally caused by excessive pressure on the light (too tight fixation and problems with the rotating shaft position of the equipment panel). This situation will lead to the decline of signal transmission quality. Generally, this problem can not be observed with the naked eye and can only be detected by OTDR.

Solution: wrap the fusion point with transparent sleeves. This loose sleeve will be molded to form a sealing bag. These sleeves are placed in the terminal block and fixed. The fixed joint will slide freely on the outer layer of the hard plastic sleeve, which can avoid the extrusion and movement of light.

5. Excessive bending of optical fiber

If the optical fiber exceeds the low bending radius, it will damage the optical fiber in the optical cable and sheath. Excessive bending can cause signal attenuation. Excessive bending usually occurs when the expansion ring of the optical cable is too tight and placed on a too small base; Or the constructor uses mouse ears or buckles to fix the overhead optical cable.

6. Reuse the old wiping paper

Reusing the wiping paper is a kind of behavior that costs a lot of money because if a piece of repeatedly used wiping paper is dirty, it will pollute other connectors it wipes. This obviously does not save costs.

A good wiping paper should be not afraid of linting and breaking, and will not pollute the end faces of other connectors. Of course, the corresponding price will be higher. Some companies are greedy for cheap and will purchase poor wiping paper, resulting in serious consequences.

Purchase of wiping paper / cloth: (1) do not buy large pieces, but small ones; (2) Don't buy large bag wipers, sell packaged products that can ensure cleanliness; (3) Make sure that the wiping paper is thrown away after being used once. Don't lose too much for too little.

7. Do not check and clean the connector end face before installation

The end face of the connector is a place easily polluted by dust and oil. Therefore, when installing the connector, we must check and clean the end face of the optical fiber connector.

These problems are often encountered in optical fiber communication. These problems will make the optical fiber network slow and bring network failures. Therefore, the construction must be carried out in strict accordance with the steps to avoid subsequent problems.